Completely dry raisins do not absorb water from a solution because.......
their outer layer does not have active pores to support diffusion. Drying has shut down their ion channels in outer-membrane for water molecules to be transported past the outer layer and reach the inner mass of the fruit.
In practice, raisin do absorb some water with prolonged soaking, try soaking some raisins in water over night and you could see that.
Prolonged submersion partially re-activates ion channels for transporting water molecules.
Hope you get the point.